using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Data.OleDb;

using System.Windows.Forms;

using System.Data;

using System.Runtime.InteropServices;

namespace WmsClient

{

    public class Excel

    {

        public static void SaveAsExcel(DataTable dtExcel)

        {

            SaveFileDialog saveFileDialog = new SaveFileDialog();

            saveFileDialog.Filter = "导出Excel (*.xls)|*.xls";

            saveFileDialog.FilterIndex = ;

            saveFileDialog.RestoreDirectory = true;

            saveFileDialog.CreatePrompt = true;

            saveFileDialog.Title = "导出文件保存路径";

            saveFileDialog.ShowDialog();

            string strName = saveFileDialog.FileName;

            if (strName.Length != )

            {

                //导出到execl

                System.Reflection.Missing miss = System.Reflection.Missing.Value;

                Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();

                try

                {

                    excel.Application.Workbooks.Add(true);

                    excel.Visible = false;//若是true，则在导出的时候会显示EXcel界面。

                    if (excel == null)

                    {

                        MessageBox.Show("EXCEL无法启动！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);

                        return;

                    }

                    Microsoft.Office.Interop.Excel.Workbooks books = (Microsoft.Office.Interop.Excel.Workbooks)excel.Workbooks;

                    Microsoft.Office.Interop.Excel.Workbook book = (Microsoft.Office.Interop.Excel.Workbook)(books.Add(miss));

                    Microsoft.Office.Interop.Excel.Worksheet sheet = (Microsoft.Office.Interop.Excel.Worksheet)book.ActiveSheet;

                    sheet.Name = "test";

                    int m = , n = ;

                    //生成列名称   这里i是从1开始的 因为我第0列是个隐藏列ID  没必要写进去

                    for (int i = ; i < dtExcel.Columns.Count; i++)

                    {

                        excel.Cells[, i + ] = dtExcel.Columns[i].Caption.ToString();

                    }

                    //填充数据

                    for (int i = ; i < dtExcel.Rows.Count; i++)

                    {

                        //j也是从1开始  原因如上  每个人需求不一样

                        for (int j = ; j < dtExcel.Columns.Count; j++)

                        {

                            if (dtExcel.Rows[i][j].ToString().GetType() == typeof(string))

                            {

                                excel.Cells[i + , j + ] = "'" + dtExcel.Rows[i][j].ToString().Trim();

                            }

                            else

                            {

                                excel.Cells[i + , j + ] = dtExcel.Rows[i][j].ToString().Trim();

                            }

                        }

                    }

                    sheet.SaveAs(strName, miss, miss, miss, miss, miss, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss);

                    book.Close(false, miss, miss);

                    books.Close();

                    excel.Quit();

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(book);

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(books);

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);

                    GC.Collect();

                    MessageBox.Show("数据已经成功导出!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

                    //toolStripProgressBar1.Value = 0;

                    System.Diagnostics.Process.Start(strName);

                }

                catch (Exception ex)

                {

                    MessageBox.Show(ex.Message, "错误提示");

                }

                finally

                {

                    KillSpecialExcel(excel);

                }

            }

        }

        private static void KillSpecialExcel(Microsoft.Office.Interop.Excel.Application m_objExcel)

        {

            try

            {

                if (m_objExcel != null)

                {

                    int lpdwProcessId;

                    GetWindowThreadProcessId(new IntPtr(m_objExcel.Hwnd), out lpdwProcessId);

                    System.Diagnostics.Process.GetProcessById(lpdwProcessId).Kill();

                }

            }

            catch (Exception ex)

            {

                Console.WriteLine("Delete Excel Process Error:" + ex.Message);

            }

        }

        [DllImport("User32.dll", CharSet = CharSet.Auto)]

        static extern int GetWindowThreadProcessId(IntPtr hWnd, out int lpdwProcessId);

    }

}